Other equity - Summary of Hedge Reserve (Detail) - Hedge reserve ₨ in Millions, $ in Millions |
12 Months Ended | |||
---|---|---|---|---|
Mar. 31, 2025
INR (₨)
|
Mar. 31, 2025
USD ($)
|
Mar. 31, 2024
INR (₨)
|
Mar. 31, 2023
INR (₨)
|
|
Disclosure Of Detailed Information About Reserve Of Cash Flow Hedges Of Equity [line Items] | ||||
Beginning balance | ₨ (1,867) | ₨ (618) | ₨ (1,328) | |
OCI for the year | (97) | (2,205) | 861 | |
Attributable to non-controlling interests | (53) | 129 | (151) | |
Amount transferred to property, plant and equipment | 1,427 | 827 | ||
Ending balance | ₨ (590) | $ (7) | ₨ (1,867) | ₨ (618) |